Plural lamp-socket.



R. B. BENJAMIN. PLURAL LAMP SOCKET. APPLIGATIOH FILED MAR. 1, 1907.

Patented Sept. 15, 1908.

2 r I w 6 4 m I i 1.. w /7 fl u 2 7 W J, W a W I. 4 7 w% UNITED sTArEs PATENT OFFICE.

I REI JBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFAC- TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PLURAL LAMP-sooner.

Specification of Letters Patent.

Application filed March 1, 1907. Serial No. 360,090.

Patented Sept. 15, 1908.

To all whcm'it may concern:

Be it known that I, REUBEN B. BENJA? MIN, a citizen-of the United States,'residing at Chicago, in the county of Cook and State of Illinois, have invented newand useful Im rovements in Plural Lam -Socket's, ol'

" 'whlch the following is a full, e ear, concise,

' as plug clusters 15' and exact description, reference being had to the accompanying drawing, forming a 130" part of thisspecificatlon. g

' This invention relates to improvements in "plu1'al lamp sockets, and particularly to that type of plural lam sockets which are known the same being provided with a plug having contacts adapted to cooperate with the contacts on a suitable socket, and carrying a plurality of lampprovision of a device of" this class which holding devices and the appropriate contacts for a plurality of lamps.

One of the objects of the invention is the made up of but few parts, and'which is economica broken sectional View of a modified form of device embodying my invention. v In the several figures of the drawings, in

Whieh like reference numerals indicate the Same 1parts throughout, 5 is a pin formed of porce an or other suitable insu ating material. This plug has formed upon its outer end a short central rejection 6 and upon its inner end is provii ed with a long central projection 7. This plug is formed with, an

i openin r 8.which extends longitudinally and central y therethrough and with openings 9 and 10 parallel'witl'i the opening 8.. Ex-

- tending around the plug 5 is a flange or shoulder 11.

The plug 5 isprovided with an outer eontactmember,preferably in the form of a corrugated or threaded metallic shell 12, having the form of an inverted cup with a cen- -tral circular opening in its bottom. This Sheil 12 is slipped onto the outercnd of the plug 5 so that, when in position, the extended end 6 of the plug projects through the central opening thereof.

The center contact of the plug is formed by a bolt 13 which extends through the cen- 'tral aperture of the plug and carries upon its lower end a metallic plate 14, this plate being adapted to conduct current to the outer contacts of each of the lamps carried by the device. Other bolts 15 and 16 extend through the apertures 9 and 10 and serve to hold the shell 12 in osition upon the plug, the edge of this shell resting upon the upper side of the flange 11. 7

Upon the inner end of each of the bolts 15 and 16 is secured a bent )late, these plates being designated 17 and 18 respectively. Each of these plates forms the center contact for one of the lamps. Theunder side of the plug 5 is formed with recesses 19 and 20, in. each of which rests one end of one of the )latcs 17 and 18; 'ljhese plates are there y prevented from swing-in around out of contact with the terminals of the lam s.

T e plate 14 comprises a ring 21 with a portion 22 projecting from each side thereof,

these pro'ections carrying other rings Each of the rings 23 is provided with a lug 24. This plate 14 is bent into a triangular form, so that each of the rings constitutes one side of the triangle, and with the ends 24 overlapping each other. plate is slipped on over the inner end of the plug 5 with the ring 21 surrounding the plug, and is prevented from turning on the plug by a pair of lugs 25 formed-integral with the ring 21 and adapted to fit into corresponding recesses 26 formed in the sides of the plug. The bolt 13, after being inserted through the opening 8 and suitable openings in the meeting and overlapping ends of the plate 24, is

then provided with a screw-threaded nut 27.

ing 30. This cover is substantially hemi- This triangular spherical in form and engages around its upper edge the outer edge of a disk 31, this disk being formed of fiber or similar non-conducting material and being held between the flange 11, of the plug and the plate 14;

A suitable insulating bushing 32, preferably formed of porcelain, is adapted to be screwed onto each of the lamp holding shells 28 and 29, insulating the same from the easing 30. When these bushings are screwed up into place the cover 30 is sustained and held in place without other means.

In Fig. 4, I have shown a portion of a modified form of the device. As shown in this figure, a-metallic plate 33 is inserted between the fiber disk 31 and the flange 11 of the plu When made up in this way the device is provided with a complete metallic cover.

Having thus described my invention, what I claim as new and desire to secure by Let-' ters Patent is:

'1. In a plural lamp socket,'a lug carrying a plurality of lamp-holding soc ets and provided with a center contact and an outer con tact adapted to cooperate with the contacts of a 'suitable socket, means extending longitiidinally through said plug adapted to conduct current to a plurality ol lamps, a lateral projection on said plug, an annular disk disposed against said projection, means l'orse curing said disk in such. position, said. disk forming a part of the. casing of thedevice, a cover adapted tireiigage said disk around its edge and having openings for the insertion of the lamps, and insulating bushings inserted on its inner end, a disk ol insulating material surrounding said plug and engaging ,the shoulder on said plug, a plate. having an annular portion surrounding said plug, the ends ol said plate approaching each other and overlapping at the end of the extension of said plug, said plate. carrying the outer contacts of a. plurality ol' lamps, and a member extending longitudinally through said plug, said member securing said plate to said plug and constituting the center contact of said I plug.

is o

3. In a plural lamp socket, the combination ot a plug having an extension on ltSflllneeend, a bolt extending longitudinally apd also forming the center contact of said p ug.

4. In a plural lamp socket, the combination of a plug, a plate bent to triangular form and having an annular=portion surrounding said plug, said plate carrying lamp-holding devices and having its ends meeting at the inner end of the plug, and a bolt extending plug.

6. In a plug-cluster, an elongated plug having a recess in its side, a contact plate having one of its ends inserted into said recess and thereby held in proper position, an outer contact member upon said plug, a bolt extending through said plug and adapted to secure said plate and said outer contact member to the plug and to provide electrical eonneetion between said members, anda lampholder disposed to present the center te-rmii nal of a lamp to said plate.

7. In a plugclustcr, a plug Formed with recesses, plates inserted into said recesses and extending therefrom, an outer contact member on said plug, said member consisting of a corrugated shell surrounding said plug, bolts extending longitudinally through said plug, said bolts securing said plates and said contact shell to the plug and providing electrical connection between said members, and a pluralityflol' lampholders each ar ranged to present the. center contact of a lamp to one of said plates.

5. ln a Pltlg-t'ltlsltl, the combination of a plug having a llange l'ormed thereon intermediate its ends, a disk having a central aperture through which extends said plug, a metallic plate having an aperture through which said plug extends, said plate. being adapted to conduct current to the outer contacts'ot a plurality of lamps and having ends apprmi'ching each other and meeting at the inner end of the plug, and a bolt extending longitudini'illy through the plug and securing the ends ol' s:iid plate to said plug and constituting the center contact of the plug, said bolt also holding said insulating disk in contact with'the flange on the plug and securing the said disk between said llange and the end of the plug, lamp-contacting means car- 'ried by said plate, and a bolt securing said having openin s for the insertion of lamps, HEW/HIS for sustaining the disk on the plug, and means for sustaining said cover in contact with said disk. 15

In Witness whereof, I have hereunto subscribed my name in the presence of two Witnesses.

REUBEN B. BENJAMIN.

'Witnesses:

EMMA GERLACH, C. L. HoPKms. 

